Dartmoor tin mining Wikipedia
The tin mining industry on Dartmoor, Devon ... Wheal Lucky and Wheal Prosper (the common prefix Wheal is a Celtic word meaning "mine" or "works"). Some larger mines, however, such as Eylesbarrow ... stamping was introduced. This involved vertical hammers powered by a waterwheel in a Stamp mill, of which at least 60 are known to have existed on ...